The effects of a change in work organization upon the work environment and musculoskeletal symptoms among letter carriers.

An organizational change among 82 postal workers was studied with the aim of evaluating the effects on the work environment, work ability, and musculoskeletal complaints. The study was undertaken in 2 suburbs of Stockholm, Sweden. Psychological work demands were estimated to be reduced at the 1-year follow-up but physical work demands had changed very little. In an observation study in a subgroup of older workers, the risk of overexertion at work and musculoskeletal complaints was reduced. In spite of that, most of the older participants (>/=35 years) had unchanged or increased musculoskeletal symptoms. This shows the need for early preventive measures.